Epithelial Tissue Epithelial tissues in the body line body cavities, cover the body surface (skin) and form glands. Functions include: protection of

Epithelial Tissue

Epithelial tissues in the body line body cavities, cover the body surface (skin) and form glands.

Functions include: protection of body parts (skin) absorption of materials (stomach lining) filtration (kidneys) secretion (mucus cells)

Epithelial TissueCharacteristics of epithelial cells/tissue:fit closely togetherfree surface that doesn’t attach to anythingbottom cells sit on a basement membraneavascular (no blood supply)regenerate easily

http://www.google.com/url?sa=i&source=images&cd=&cad=rja&docid=krT2no-a64cBNM&tbnid=0RSyn6oPNpn-HM:&ved=0CAgQjRwwAA&url=http://www.bio.davidson.edu/people/kabernd/berndcv/lab/epithelialinfoweb/simple%20squamous%20epithelium.html&ei=0DhwUqvPJ-fR2wWa-oHYCQ&psig=AFQjCNFVs6KK434cr-2la1tZvBovcQIXWw&ust=1383172688716079

Epithelial TissueClassification: each epithelial tissue has two names that indicate (1) the number of layers and the (2) shape of the cells.

Number of layers:Simple - one layer of

cells resting on the basement membrane

Stratified – more than one layer of cells

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=rKqh_3Vb4cOYzM&tbnid=5RF3EBbjcKr1SM:&ved=0CAUQjRw&url=http://www.apsu.edu/thompsonj/Anatomy%20&%20Physiology/2010/2010%20Exam%20Reviews/Exam%201%20Review/Ch04%20Epithelium.htm&ei=LTpwUs__DYjx2wXujoDADQ&bvm=bv.55123115,d.b2I&psig=AFQjCNFM-tCxyJfFmwvnsKkAXU4qIFKJPA&ust=1383172578496561

Epithelial TissueClassification: each epithelial tissue has two names that indicate (1) the number of layers and the (2) shape of the cells.

Shapes of the cells:squamous – flat, platelike cellscuboidal – cube-shaped cellscolumnar – column-shaped cells

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=-6Y81dheDywRAM&tbnid=G4K2WcL9hv3o2M:&ved=0CAUQjRw&url=http://biologycorner.com/anatomy/histology/&ei=gjtwUu3sI-a-2AWAtIGACQ&bvm=bv.55123115,d.b2I&psig=AFQjCNFM-tCxyJfFmwvnsKkAXU4qIFKJPA&ust=1383172578496561

Epithelial Tissue: Exceptions

Pseudostratified:single layer of columnar cells of different sizeall cells rest on the basement membranesome cells do not reach the free surfacemodified versions have cilia (free surface)

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=n9nmIePAMEOreM&tbnid=c4P7q3eY1oEoMM:&ved=0CAUQjRw&url=http://kentsimmons.uwinnipeg.ca/cm1504/15lab404/15lb4p4.htm&ei=sDxwUoolws3YBZWLgaAG&bvm=bv.55123115,d.b2I&psig=AFQjCNGQ6YKhn5j_oC6YryPEXo-zfxqSZg&ust=1383173649097187

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=0f0D5Qrxln1PlM&tbnid=IDzE5fbvFVQGYM:&ved=0CAUQjRw&url=http://nh-chs-anatomy.pbworks.com/w/page/68992584/Epithelial%20Tissue%20(Volz,%20Janeda)&ei=4jxwUv6sOuLh2QWAt4GoBA&bvm=bv.55123115,d.b2I&psig=AFQjCNGQ6YKhn5j_oC6YryPEXo-zfxqSZg&ust=1383173649097187

Epithelial Tissue: Exceptions

Stratified squamous:basal cells are cuboidal or

columnarsurface cells are squamous

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=n9nmIePAMEOreM&tbnid=5tZJXOPqzFmBOM:&ved=0CAUQjRw&url=http://kentsimmons.uwinnipeg.ca/cm1504/15lab404/15lb4p4.htm&ei=5T1wUvmIHpCA2QXXyIH4Dw&v6u=https://s-v6exp1-ds.metric.gstatic.com/gen_204?ip=108.90.124.15&ts=1383087510370563&auth=rnj2carom4myvd3icscee6qvgrq2qjju&rndm=0.31918054992973166&v6s=2&v6t=82232&bvm=bv.55123115,d.b2I&psig=AFQjCNHa3I7jcw8d6fLkriK7V6d-k4IptQ&ust=1383173910488105

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=mIs2bM-EGy97TM&tbnid=PXZLrYjyxNI7-M:&ved=0CAUQjRw&url=http://www.popscreen.com/tagged/mucosa&ei=jD5wUpDuIqWr2AXS-IHoCQ&bvm=bv.55123115,d.b2I&psig=AFQjCNHa3I7jcw8d6fLkriK7V6d-k4IptQ&ust=1383173910488105

Epithelial Tissue: ExceptionsStratified cuboidal & columnar:only two cell layers outermost cells are the indicated shape

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=5IK-1j6x232-mM&tbnid=6-gFH09TjFYs8M:&ved=0CAUQjRw&url=http://smallcollation.blogspot.com/2013/08/stratified-cuboidal-epithelium.html&ei=tUBwUsavBsWt2AWa1oCwCQ&psig=AFQjCNHy8gyBY6I1Mo27ABnaoyPOIkBaBg&ust=1383174649334659

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=JJMuZtn4lndEeM&tbnid=YjE4MdDp9ZV-fM:&ved=0CAUQjRw&url=http://microanatomy.net/epithelia/stratified_columnar.htm&ei=PUFwUtXlJ-np2QX9v4D4BQ&psig=AFQjCNGZFyV2qFayVA-ch1IMAsQlxkwpZg&ust=1383174802826712

Epithelial Tissue: ExceptionsTransitional:basal cells are cuboidal or columnarcells at the free surface are various shapes that

stretch to accommodate liquid volume (bladder)

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=Mn6-nvyThqH30M&tbnid=j3qka4eduocXCM:&ved=0CAUQjRw&url=http://nhscience.lonestar.edu/biol/urinary/bladder3.htm&ei=OUJwUuu8GKWp2gXsuoC4CQ&psig=AFQjCNFOhfRVEXOrrkFbzh1j4002TnWNqw&ust=1383175093847047

Epithelial Tissue: GlandularGlandular tissue: epithelium that makes up glands (secretions)

Two types:Endocrine (ductless glands that secrete

hormones directly into the blood stream)Exocrine (attached to ducts; secretions empty

into ducts)

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=g9OzLaiMaKrx2M&tbnid=uNfciU8pMRAbZM:&ved=0CAUQjRw&url=http://nh-chs-anatomy.pbworks.com/w/page/68951004/Epithelium%20tissue%3A%20Kaitlyn%20and%20Michelle&ei=u0RwUtWYKKSW3AX7l4C4Dg&bvm=bv.55123115,d.b2I&psig=AFQjCNG7tSpClawvJBLLQY2b65pm5JNFWg&ust=1383175581310714

Documents

Epithelial Tissue Epithelial tissues in the body line body cavities, cover the body surface (skin) and form glands. Functions include: protection of